Shears.



No. 643,539. Patented Feb. [3, I900.

G. B. ROWE.

8HEARS.

Application med June 10, 1899.) (No Model.) 2 Sheets-Sheet l.

5 wvewboz No. 643,539 Patented Feb. I3, 1900.

G. B. ROWE.

SHEARS.

'AmvlicaJ-ion filed June 10, 1899.) (No Model.) 2 SheetsSheei 2.

we NORRIS FETERS 50.. PHOTO-LITHO., WASHINGTON, m c

UNITE STATES PATENT OFFICE.

GEORGE B. ROWE, OF MOORE, OKLAHOMA TERRITORY.

SHEARS.

SPECIFICATION forming part of Letters Patent No. 643,539, dated February13, 1900.

Application filed June 10, 1899. $erial No. 720,074.. (No model.)

To aZZ whom it may concern.-

Be it known that I, GEORGE B. ROWE, a citizen of the United States,residing at Moore, in the'county of Cleveland, Oklahoma Territory, haveinvented certain new and useful Improvements in Shears; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to shears and scissors, the object being toprovide an article of this type having double cutting edges wherebysmooth or bearded cutting edges may be brought into position for activeoperation, as desired and found most advantageous, according to thenature of the article to be cut.

Theimprovement consists, primarily, of the special formation of theshear-blades and the means for adjustably connecting the handlestherewith, whereby either set of cutting edges may be brought intoposition for convenient operation.

The improvement also consists of the novelv features, details ofconstruction, and combinations of parts, which hereinafter will be moreparticularly set forth, illustrated, and finally outlined in thesubjoined claims.

The invention is susceptible of application to any make or style ofshears orscissors. Hence it is to be understood that in thepracticalembodiment thereof various changes in the form, proportion, andminor details of construction may be resorted to without de parting fromthe spirit or sacrificing any of the advantages of the invention.

Referring to the drawings forming a part of the application, Figures[and 2 are detail plan views of the shears, showing the smooth and thetoothed or bearded cutting edges in cooperative relation. Fig. 3 is aview showing the shear-blades and handles adjusted to adapt the devicefor cutting cord, seams, and analogous articles. Fig. 4 is a View of theinner side of a shear-blade and attached handle. Fig. 5 is a detail viewof the butt-end portion of a shear-blade. Fig. 6 is a detail View of ahandle. Fig, 7 is a reverse View of the handle. Fig. 8 is a detail Viewof the nut cooperating with the handle to secure it against accidentalslipping. Fig. 9 is a transverse section of the shears about in linewith the pivotal connection of the blades. Fig. 10 is a detaillongitudinal section. Fig. 11 is a detail view of the pivot-fastening.Fig. 12 is a detail view of the spring locking-wedge.

Fig. 13 is a detail view of the clamp-screw and washer pivotally connectinga handle with a shear-blade. Fig. 14 is a detail view of adifferent form. Fig. 15 is a section on the line Y Y of Fig. 14.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The shear-blades 1 are of like formation and are provided with doublecutting edges, one edge, as 2, being smooth and the opposite edge 3toothed or bearded. The blades are preferably of concavo-convexform,'the inner or opposing sides or faces being hollow, therebyadmitting of the edges being in a measure self-sharpening or readilymaintained in grooves 5, formed along an edge portion of each blade uponthe outer surface thereof,

said grooves being parallel and rearwardly inclined and comprising astraight wall and an inclined wall, whereby the teeth of the beardedcutting edge incline toward the point of the shear-blades in the mannerof sawteeth, whereby the best results are attained in the use of theshears.

The segment heads 4 project beyond the cutting edges of theshear-blades, and their terminal portions provide lateral cutting edges6 and 7,the cutting edges 6 being smooth and the cutting edges 7 toothedor bearded. These lateral cutting edges are relatively divergent and,with the contiguous portions of the longitudinal cutting edges 2 and 3,form approximately wedge or triangular shaped spaces to receive heavyseams, cord, or the like requiring to be out, said cord or analogousheavy article being cut by a shear action between four cutting edges, aswill be readily understood upon reference to Fig. 3 of the drawings.

The shear-blades are best formed by being struck up or stamped fromsheet metal, the outward deflection thereof between the longitudinaledges stiffening and strengthening them. Filling-blocks 8 are riveted orotherwise secured to the hollow sides of the blades near their inner orbutt ends and stiffen them and provide an extended bearing for thepivot-fastening 9, by means of which the blades are connected, openingsextending transversely through the filling-blocks and blades and havingcoincident relation, so as to admit of the blades lying the one againstthe other. The pivot-fastening 9 is headed at one end, and its oppositeend is formed in its sides with notches 11, which receive the portionsof the locking-wedge 12 upon opposite sides of the longitudinal slot1.3. This pivot-fastening is passed through the registering openings 10of the shear-blades when properly positioned, and thelocking-wedge 12 isfitted tothe notched end thereof. Theslot13 of the locking-wedge isenlarged at one end, as shown at 14, to admit of the terminal portion ofthe pivot-fastening passing therethrough, whereby the opposite notches11 may be brought into position to receive the edge portions of thewedge bordering upon the slot 13, the wedge being engaged with thenotches 11 by a longitudinal sliding movement. The locking-wedge curveslongitudinally and holds the shear-blades together by a spring action,thereby admitting of the blades yielding to obviate injury to theircutting edges.

The handles 15 are of like formation, and each is provided at one endwith an eye or loop 16 for the reception of a thumb or finger of thehand and an expanded portion 17 at the opposite end. An opening 18 isformed centrally of the terminal portion of the part 17, and is adaptedto receive the fastening 19, by means of which the handle is pivotallyconnected with its shear-blade. An areuate slot 20 is formed in theexpanded end 17 concentric with the opening 18 and receives thefastening 21, by means of which the handle is adjustably secured to theshear-blade. The inner face of the part 17 is toothed or roughened, asshown at 22, to match corresponding teeth 23 or corrugations formed inthe outer face of the segment head 4, the two sets of teeth 22 and 23interlocking, so as to prevent slipping of the handle when moved to therequired position. The fastening 21 consists of a clamp-screw passingthrough an opening 24, formed in the segment head 4, and receives a nut25 at its outer threaded end, said nut being toothed or roughened uponits inner face, as shown at 26, to engage with corresponding teeth orcorrugations 27, formed upon the outer face of the expanded end 17,adjacent to the arcuate slot 20. These means supplement the action ofthe fastening 19 to hold the handle firmly to the expanded end of theshear-blade in the desired position.

The fastenings 19 consist of headed screws 28 and thumb-nuts 29 and passthrough corresponding openings formed in the shearblade and handle. Oneof the headed screws is formed with a square or angular portion 30 toreceive a washer 31, which is mounted thereon and interposed between thehandle and the thumb-nut, said washer preventing turning of the screwwhen loosening the thumb-nut to admit of an adjustment of the handle.The outer face of the expanded end 17 is convex and the adjacent face ofthe washer is concave. Hence the washer is prevented from turning whenloosening the thumb-nut sufficiently to admit of an adjustment of thehandle when the fastening 2]. is loosened. The opposite headed screw 28is formed with flattened or notched sides 32 to enter the slot 13 of thelocking wedge, whereby said screw is prevented from turning whenoperating the thumb-nut 29 either to tighten or loosen the fastening 19.

For convenience of operation the handles are adjusted relatively to oneside or the other of the longitudinal center of the respectiveshear-blades, depending upon the nature of the cutting edges required tobe brought into active operation. \Vhen it is required to shift theposition of the handles with reference to the shear-blades, thefastenings 19 and 21 are loosened to admit of a disengagement of theinterlocking teeth or corrugations of the matching parts, when thehandles can be moved to the required position. A retightening of thefastening previously loosened will effect a securement of the handles inthe located position. Some of the various positions of the handles areillustrated in Figs. 1, 2, and 3, the same admitting of the differentcutting edges being brought into position for effective service.

In the form shown in Fig. 14 the shearblades 1 are formed with shanks33, which are wed ge-shaped in cross-section to interlock with dovetailmortises 34 in the tangs 35 of the handles 36, said handles beingdetachable, so as to be reversed when changing the relation of theblades to bring a different set of cutting edges in position for activeoperation. The shear-blades are connected in the manner hereinbefore setforth. Fastenings 37 connect the handles to the shanks of the blades,and each has a notch 38 in its side in the plane of the shank, so as tobe brought in register therewith to admit of a detachment of the handle.The openings through which the fastenings 37 pass intersect with thedovetail seats or mortises 34, and when the fastenin gs are turned tothrow the notches 38 away from the shanks 33 the latter and the handlesare made fast.

Having thus described the invention, what is claimed as new is- 1.Scissors or shears comprising a shearblade having double cutting edges,one being smooth, the other roughened or toothed, substantially as setforth.

2. Shears or scissors composed of shearblades, each comprising doublecutting edges, the one smooth, the other roughened or toothed, andadapted to have either the smooth or the toothed cutting edges broughtinto position for active operation.

3. Shears or scissors composed of blades each having one edge smooth andits opposite edge toothed, a multiplicity of grooves in its outer sidealong one edge forming the said teeth, substantially as set forth.

4. Shears or scissors composed of blades having double cutting edges andof concavoconvex form in transverse section, one of the edges beingsmooth and the opposite edge toothed and formed by rearwardly-inclinedgrooves in the outer face of each of the blades along an edge portionthereof, substantially as described.

5. In shears or scissors having the butt or pivotal ends of the bladesexpanded and approximately of segmental form, with the projectingterminals of the expanded portions forming lateral cutting edges,handles adjustably connected with the expanded ends of the blades tobring either set of lateral cutters into active operation, substantiallyas described.

6. In shears or scissors having the butt or pivotal ends of the bladesexpanded and approximately of segmental form, with the projectingterminals of the expanded portions forming lateral cutting edges, oneset of cutting edges being smooth and the other set toothed, handleshaving adjustable connection with the segmental ends of the blades tobring either the smooth or the toothed cutting edges of the saidsegment-formed ends into position for active operation, substantially asset forth.

7. Shears or scissors having oppositely-disposed offstanding portionsadjacent to the pivot of the blades forming outwardly-ex tendingcutters, one of which is smooth and the other toothed or roughened,substantially as set forth.

8. Shears or scissors having their butt-ends expanded to formapproximately segment heads,handles having pivotal connection with theshear-blades, one of the parts having an arcuate slot and a fasteningadapted to enter the said slot and secure the handle in an adjustedposition, substantially as set forth.

9. In shears or scissors, a blade having. its butt-end expanded forminga segment head, a handle having pivot connection with the expandedportion of the blade and provided with an arcuate slot concentric withsaid pivot-fastening, and means for securing the handle to the expandedportion of the blade and operating in the arcuate slot of the handle,substantially as set forth.

10. In shears or scissors having adjustable handles, a pivot fasteningconnecting the blades, a locking-wedge for securing saidpivot-fastening, and a fastening for the locking-wedge and adjacentadjustable handle for fixing the position of both, substantially asdescribed.

11. In shears or scissors, the combination with the blades, apivot-fastening connecting the blades and having an end portion formedwith opposite notches in its sides, an adjustable handle applied to oneof the blades, a fastening for securing said handle to the blade in anadjusted position, a spring lock ing-Wedge adapted to cooperate with thepivot-fastening of the blades and receiving a reduced portion of thefastening between the handle and blade in its slot, whereby saidfastening is maintained in a normal position when being tightened orloosened, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE B. ROWE.

Witnesses:

FRANK BRUCE, W. H. SCALES.

